Android Activity的生命周期详细介绍

publicclassMainActivityextendsActionBarActivity {

  privatefinalstaticString TAG ="MainActivity";

  @Override

  // Activity被创建时调用

  protectedvoidonCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);

    Log.e(TAG,"onCreate.......");

  }

  @Override

  // 该状态用户可见，但是用户还不能与之进行交互

  protectedvoidonStart() {

    super.onStart();

    Log.e(TAG,"onStart.......");

  }

  @Override

  // 该状态是Activity获得用户焦点，用户可以与之进行交互

  protectedvoidonResume() {

    super.onResume();

    Log.e(TAG,"onResume.......");

  }

  @Override

  //与onResume对应，当Activity失去焦点时调用

  protectedvoidonPause() {

    super.onPause();

    Log.e(TAG,"onPause.......");

  }

  @Override

  //与onStart对应，当Activity不可见时调用

  protectedvoidonStop() {

    super.onStop();

    Log.e(TAG,"onStop.......");

  }

  @Override

  //与onCreate对应，当Activity被销毁时调用

  protectedvoidonDestroy() {

    super.onDestroy();

    Log.e(TAG,"onDestroy.......");

  }

  @Override

  //Activity从后台重新回到前台调用

  protectedvoidonRestart() {

    super.onRestart();

    Log.e(TAG,"onRestart.......");

  }

}